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oceanbase-admin
2021-05-31 22:56:52 +08:00
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src/sql/resolver/dcl/ob_rename_user_resolver.cpp Normal file
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX SQL_RESV
#include "sql/resolver/dcl/ob_rename_user_resolver.h"
#include "sql/session/ob_sql_session_info.h"
using namespace oceanbase::sql;
using namespace oceanbase::common;
ObRenameUserResolver::ObRenameUserResolver(ObResolverParams& params) : ObDCLResolver(params)
{}
ObRenameUserResolver::~ObRenameUserResolver()
{}
int ObRenameUserResolver::resolve(const ParseNode& parse_tree)
{
int ret = OB_SUCCESS;
ParseNode* node = const_cast<ParseNode*>(&parse_tree);
ObRenameUserStmt* rename_user_stmt = NULL;
if (OB_ISNULL(params_.session_info_)) {
ret = OB_NOT_INIT;
LOG_WARN("Session info is not inited", K(ret));
} else if (node != NULL && T_RENAME_USER == node->type_ && node->num_child_ > 0) {
if (OB_ISNULL(rename_user_stmt = create_stmt<ObRenameUserStmt>())) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_ERROR("Failed to create ObRenameUserStmt", K(ret));
} else {
stmt_ = rename_user_stmt;
rename_user_stmt->set_tenant_id(session_info_->get_effective_tenant_id());
for (int i = 0; i < node->num_child_ && OB_SUCCESS == ret; ++i) {
ParseNode* rename_info = NULL;
if (OB_ISNULL(rename_info = node->children_[i])) {
ret = OB_ERR_PARSE_SQL;
LOG_WARN("Child should not be NULL", K(ret), K(i));
} else if (4 == rename_info->num_child_ && T_RENAME_INFO == rename_info->type_ &&
NULL != rename_info->children_[0] && NULL != rename_info->children_[2]) {
ObString from_user(rename_info->children_[0]->str_len_, rename_info->children_[0]->str_value_);
ObString from_host;
ObString to_user(rename_info->children_[2]->str_len_, rename_info->children_[2]->str_value_);
ObString to_host;
if (NULL == rename_info->children_[1]) {
from_host.assign_ptr(OB_DEFAULT_HOST_NAME, static_cast<int32_t>(STRLEN(OB_DEFAULT_HOST_NAME)));
} else {
from_host.assign_ptr(
rename_info->children_[1]->str_value_, static_cast<int32_t>(rename_info->children_[1]->str_len_));
}
if (NULL == rename_info->children_[3]) {
to_host.assign_ptr(OB_DEFAULT_HOST_NAME, static_cast<int32_t>(STRLEN(OB_DEFAULT_HOST_NAME)));
} else {
to_host.assign_ptr(
rename_info->children_[3]->str_value_, static_cast<int32_t>(rename_info->children_[3]->str_len_));
}
if ((0 == to_user.case_compare(OB_RESTORE_USER_NAME)) ||
(0 == from_user.case_compare(OB_RESTORE_USER_NAME))) {
ret = OB_ERR_NO_PRIVILEGE;
LOG_WARN("__oceanbase_inner_restore_user is reserved", K(ret));
} else if (from_user.length() > OB_MAX_USER_NAME_LENGTH) {
LOG_USER_ERROR(OB_WRONG_USER_NAME_LENGTH, from_user.length(), from_user.ptr());
} else if (to_user.length() > OB_MAX_USER_NAME_LENGTH) {
LOG_USER_ERROR(OB_WRONG_USER_NAME_LENGTH, to_user.length(), to_user.ptr());
} else if (OB_FAIL(rename_user_stmt->add_rename_info(from_user, from_host, to_user, to_host))) {
LOG_WARN("Failed to add user to ObRenameUserStmt", K(ret));
} else {
// do nothing
}
} else {
ret = OB_ERR_PARSE_SQL;
LOG_WARN("sql_parser parse rename_info error", K(ret));
}
} // end for
}
} else {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("rename user ParseNode error", K(ret));
}
return ret;
}